function stopPropagation(event) {
    var e = event || window.event;
    if (e.stopPropagation) e.stopPropagation();
    else e.cancelBubble = true;
    return false;
}
function preventDefault(event) {
    var e = event || window.event;
    if (e.preventDefault) e.preventDefault();
    else e.returnValue = false;
    return false;
}
function stopEvent(event) {
    var e = event || window.event;
    if (e.stopPropagation) e.stopPropagation();
    else e.cancelBubble = true;
    if (e.preventDefault) e.preventDefault();
    else e.returnValue = false;
    return false;
}